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Homework Help: Is the soeed of an electron relativistic?

  1. Mar 31, 2009 #1
    1. The problem statement, all variables and given/known data
    Determine the speed of an electron in a hydrogen atom (radius .5 * 10^-10 m) and state if it is relativistic. (Treat the electron as through it were in a circular orbit around the proton.) (Given that .1c and greater is relativistic)

    2. Relevant equations
    not sure...
    L=L0 (1-v^2/c^2)^1/2

    3. The attempt at a solution
    I don't really know where to start. I assume the fact that the electron has a centripetal acceleration and velocity comes into play somehow.
  2. jcsd
  3. Apr 1, 2009 #2
    solved it!
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